$ git clone -n https://src.fedoraproject.org/rpms/python-matrix-common.git /var/lib/mock/f40-build-2707486-71330/root/chroot_tmpdir/scmroot/python-matrix-common
Cloning into '/var/lib/mock/f40-build-2707486-71330/root/chroot_tmpdir/scmroot/python-matrix-common'...
$ git fetch origin 23b698dbd152aeba36734a6c6e1a5f69e6b28f37:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-matrix-common
 * [new ref]         23b698dbd152aeba36734a6c6e1a5f69e6b28f37 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 23b698d Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild